Trying to use RequestFilter.filterRequest event to convert CDATA SOAP Response to XML. Not working

I have a SOAP request which returns the complete response in CDATA. I am trying to convert it to XML using the RequestFilter.filterRequest event handler. But it is not working. The response is still coming back as CDATA. I am using the following help document (which is no help at all obviously)...

http://readyapi.smartbear.com/readyapi/events/handlers

My code:

def content = context.httpResponse.responseContent
content = content.replaceAll("<![CDATA[<QuoteObject>", "")
content = content.replaceAll( "]]>", "")

log.info( content )

context.httpResponse.responseContent = content

Please help.